20312440121044 has 6 divisors (see below), whose sum is σ = 35546770211834. Its totient is φ = 10156220060520.

The previous prime is 20312440121041. The next prime is 20312440121081. The reversal of 20312440121044 is 44012104421302.

It can be written as a sum of positive squares in only one way, i.e., 20043421552144 + 269018568900 = 4476988^2 + 518670^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312440121041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2539055015127 + ... + 2539055015134.

Almost surely, 2^{20312440121044} is an apocalyptic number.

It is an amenable number.

20312440121044 is a deficient number, since it is larger than the sum of its proper divisors (15234330090790).

20312440121044 is a wasteful number, since it uses less digits than its factorization.

20312440121044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078110030265 (or 5078110030263 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 20312440121044 its reverse (44012104421302), we get a palindrome (64324544542346).

The spelling of 20312440121044 in words is "twenty trillion, three hundred twelve billion, four hundred forty million, one hundred twenty-one thousand, forty-four".